abstracting USAGE
Merge branch 'nh_single_clp' of https://github.com/broadinstitute/picard into nh_single_clp
Updated usage documentation and programGroup info for single command line program effort.
Merge branch 'nh_single_clp' of https://github.com/broadinstitute/picard into nh_single_clp
Merge remote-tracking branch 'origin/gg_branch_nh_single_clp' into nh_single_clp